Jack



Aug. 19, 1930. A. DlcKERsoN JACK Filed Aug. 1l, 1928 2 Sheets-Sheet 2 Patented Aug. 19, 1930 l'UNITI-:D sr.Ax-reyes 'ARTHUR nrexEnsoN, or sAL'r'LAxE CITY, UTAH @TACK Application rue-a August 11, 1928.9seria1 No. 299,086. y o

v1g which will be extremely :easy to `operate andA one which .may be raised to any given point before inserting Iit under the load to be lifted and which may be `released to its initial position after it has -been used and it is desired toy drop the load.

These objects I accomplish with `the delvice illustrated in the accompanying drawings in 'which similar vnumerals and letters of yreference indicate like par-ts 'throughout the 2o several views andas described inthe specification forming a part -of this application and pointedout in the appended claims.

In the drawings in which I have shown the best and vmost 'preferred mannery of building my invention, Figure 1 is a side elevation lof theV jack. Figure 2 is a side relevation from the reverse side of Figure 1.V Figure 3 is a kside view of one of the gears. Figure 4 -is a face view o-f the same. Figure 5 is a side :xo-view of anothergear used inthe jack. Fig` ure 6 is a face view of Figure 5. Figure 7 is a side View Iof one -of the friction members.'

Figure 8 is a face view of Figure 7. Figure 9 is a side view of thefriction leather. Figure 10 is a face View of the same. Figure 11 is a plan view of the jack with the lifting arms removed. Figure 12 is a section of line 12-12 of Figure 2. Figure 13 is a section on line 13-13 of Figure 1. Figure 14 is an edge view of the operating handle. Figure 15 is a plan view of the same.

In the drawings I have shown the base of the jack as A. Upon the top and near one side of the said base A, I provide a supporting frame B, with the lower end of the frame B formed into a foot C. The said frame B is cast integral with the base A and is curved upwardly and backwardly in the form of an are with a hole bored through the top end thereof in which a pivot pin 2 is carried. An

curely in place. `said frame B `a flat circular friction washer enlarged section B1 is formed on the frame B to provide a friction surface. A triangular shaped lifting lever segmenti) Ais pivotally fulcrumed and supported by the said pin passing through the lever at the axis lof the segi ment gear 3, which gear 3 is formed on the base of the segment D `and with the said gear 3 forming the base vofthetriangular shaped segment D with `teeth 4 formedon the face of Ithe gear, and with a leg 5v secu-ringthegear segment kto form one side of the triangle and the other side or leg isformed by the leg 6, having an extension 7 formed into a lifting foot 8, the top side of which is formed into two curved receptacles i9 and 10 curvedto fit under the side-vof van -aXle of an automobile. The under side of the lifting foot vr8 is fiat and rests upon the foot C when the 'j ack is 'not bemg used or afterv it has been used and released.

Through the body 7of the frame B I provide a shaft 11, having a flanged gear wheel 12 screwed onto one end-thereof'with the teeth Aof the gear wheel 12 :engagingwith the teeth 4 of the gear segment 3, `so that when the shaft 11 vis rotated the gear 12y rotates and moves the lifting 1everv8 Vup or down as necessary. On the other end of the-said shaft 11, Improvide a large gear wheel 141, and above andsli'ghtly to the --rear of the shaft 11, I provide another shaft 15 which -shaftl is also passed through the frame Bl and :also has both ends threaded. One end ofthe said shaft 15 is screwed into the frame B and has a lock nutl Vscrewed thereonto hold it se- On the other side vof the 17 is placed and next to the washer I provide a friction plate 18, `which plate 18 is adapted Yto Abe forced against the washer 17, forcing it Aagainst the side of the :frame B and holding the'washer and plate from rotating by the friction thereby created. The outer side of the said plate 18 is provided with a diametrical boss 19 yformed thereon, which boss 19 is boredradi'ally bythe holes 20, in which holes v2O springs 21 are kplaced and locking f dogs 22 are placed on top of the springs121lwiththe springs adapted to'hold the/,dogs outwardly, Ithen provide a anged .e fak? new einem =k j wheel 23, which wheel is provided with a liItlishepl'ings 21 lpress them outwardly- The ich are cut on the innlr pe- *1 are cutfwit ,one s Quid side strafmaat fmdial ma` 'n the teeth in the formsofsfratchet teeth so that the 22(l will enga with the teeth when mvmedin o'ne direc ion and disengage b sliding over the slopingsurface 1 whenthe w eel 23 1a rotated in the opposite direction. The outeagaaepheryof the wheel 'jpprOVided ogengaging teeth 25a y ther ear wheel 231is formed "1v1-,hee smet ffwheei es with the l-afan; engage with the li fV tlefgeaf I then provide "wheelilfhaving a flange formed adapted't into the bore of the fr andtolpress against the face of itliejplateis. The wie uf the wheel 26 is and eng ges'with the threads of4 a'the'shbftll and' when* the wheel 26` is turned .nlibidirtion thethreds thereon press it "'iitltlie p aft'el' forcingsaid plate against jw'sher'l "a'd preventlng thecomponent of "the entire"deviceV from rotating. elit1w is turnediin the oppositey direction ateismoveditsyfromthe washer and if g",`leasing`"the device, A handle H is lpd'el with'an enlarged portion formed 'i e'imoneend'f 'theref and"y having an elon gated hole 27` therethrou h, with the hole 27 iici'rlingftiie fiaiigeoft e wheel 265 A dog 28 informed on one side of the handle H near {eldfthereofandis' adapted to'engage lth'thte teeth' of' tli'wheel' 26 and another le; rv- 'is fomedfafleveithe .holef27 adapted #to am wettbewerb 251 of the wheel thatwhenf the 'handle ismov'ed in one' 'nf'the dogwfwill ng'agewithfthe' er w ' Athe handleh` shed forw'ardrthe do i operation of rmy device is las follows:

i u; 502i YThelhandle, is movedbackwardly engaging with the'teethof the wheel26 and "thefm'hferator then moves the handle ndown' flocking# thewheel inwardly 'forcing the' late @"th'ewasher ITand frameB o the d ator havingi locked the device for freerpta ion thenpushes the handle forwsraengaging'nhe aeg-e9 with the aah 25- "fijfjthd wheel"23,'1he then presses downwardly 'g @inthe handle arid `,eine `motion rotates the a #aser-,esatta roman tiie'wgear v2a 'which in l f'oitateatheisla'ft ll, and the gear wheel `tllereby moyingthesegment 3 and'iraising 'n fitheliftng lever F.j "When the leverhas been ji'r'ai 'esiicenty it is desired to lower use; y .Having thus described my invention I deuntil the dog 28 engages the teeth of the wheel 26 and then raises the handle moving the wheel 26 away from the plate 18 releasing the locking friction created thereby and the weight of the lever D will be sufiicient to draw it down to the foot C and the jack is ready to be placed away or for further Sire to secure by Letters Patent and claim:

In'"'a"jack`the combination of a base member having a supportin frame formed integral therewith and wit a foot formed near the lower end of the said frame; a lifting member pivoted to the free end of said frame, said lifting member being formed of a segment of a circular rack with one leg being extended and having lifting sockets formed o n the top side thereof; a shaft through the main frame ha'ving a fianged gear wheel on one end thereof and a larger gear wheel on the other side of the frame with the teeth of the lifting member meshing with the teeth of the flanged gear wheel; another shaft passed V`through the frame having one end secured therein and having a friction locking means secured on the other side of the frame, said friction locking meansv consisting of a friction washer, a friction plate engaging one Side of said washer, dogs carried in said friction plate, a flanged wheel having teeth on the inner face of the flange in 'which the do s engage, and a gear on Vthe outer side of said flanged wheel adapted to engage with the large gear wheel on the first mentioned shaft, teeth on the outer perimeter of said flanged Wheel, a toothed wheel carried on threads on the end of said shaft, and a handle carried betweensaidlast mentioned wheel and said fianged wheel having do formed one on each side thereof, said dogs a apted to engage with either the teeth on the perimeter of the flanged wheeler with the teeth of the toothed wheel 'to rotate either `wheel as necessary to lock the jack-r or to raiser the lifting member as desired. l Y

In' testimony whereof I have affixed my ARTHUR DICKERSON.

" signature.

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